_Hab._ Paraguay, Argentina, Patagonia, and Chili. This prettily variegated blue-grey Teal with its strongly marked bill is perhaps the most abundant of the genus in the Argentine Republic, especially in the southern portion. It is resident, and unites in much larger flocks than any other bird of this group in the country. Its note when disturbed or flying is very peculiar, resembling in sound the muffled stridulating of the mole-cricket. Durnford found it common and breeding at Baradero. 348. QUERQUEDULA TORQUATA (Vieill.). (RING-NECKED TEAL.) +Querquedula torquata+, _Scl. et Salv. Nomencl._ p. 129; _iid. P. Z. S._ 1869, p. 635 (Buenos Ayres), et 1876, p. 389; _Burm. P. Z. S._ 1872, p. 367 (Paraná). _Description._--Above earthy brown; head above and neck, which expands into a half-collar, together with the lesser wing-coverts, lower back, and tail above, black; scapulars pure chestnut; wings brownish black, with a large white blotch on the coverts of the secondaries, which are themselves bronzy green: beneath, sides of head and throat dirty white streaked with brown; breast tinged with rosy red and sparingly spotted with black; belly and flanks white, very narrowly barred with grey; crissum black, with a white blotch on each side: whole length 14·0 inches, wing 7·2, tail 2·7. _Female_: brown; superciliaries and stripe on each side of the head with the throat and sides of the neck white: beneath white, banded across with brown; wings and tail black; secondaries bronzy green; wings with a white blotch as in the male; bill reddish; feet brown. _Hab._ Paraguay and Argentina. This beautiful Duck, for our first knowledge of which we are indebted to Azara, is rather scarce in collections. Azara described the two somewhat dissimilar sexes under different names, the male being his _Pato collar negro_, and the female his _Pato ceja blanca_. In the neighbourhood of Buenos Ayres the Ring-necked Teal is strictly migratory, and in the month of October appears in small flocks in the marshes along the river; but in the interior of the country it is seldom met with. They are extremely active birds, constantly flying about from place to place both by day and night; and in the love-season, when they alight in a pool of water, the males immediately engage in a spirited combat. While flying they utter a peculiar jarring sound, and occasionally a quacking note, rapidly repeated and sounding like a strange laugh; but on the water, especially in the evening, the male emits a long inflected note, plaintive and exquisitely pure in sound--a more melodious note it would be difficult to find even among the songsters. 349. QUERQUEDULA BRASILIENSIS (Gm.). (BRAZILIAN TEAL.)